Viessmann Vitodens 100-W WB1B Installation And Service Instructions Manual page 23

Further details regarding the individual steps
Commissioning, inspection, maintenance
(cont.)
6. Adjust the lower output:
Turn rotary selector "tr" to the
left control range.
The display shows 1 bar for lower
output.
7. Test the CO content for lower out-
2
put.
The CO content must be between
2
7.5 and 10.5 %.
8. If the CO content is within the
2
given range, continue with point
15.
If the CO content is not within
2
the given range, check the flue
gas/ventilation air system for
tightness.
Remedy any leaks.
9. Test the CO content for upper
2
and lower output again.
If the CO content is still not
2
within the given range, adjust the
CO content.
2
10. Adjusting the CO
Adjust the upper output.
11. With the adjusting screw B, set
the CO content for upper output
2
to 9 %.
12. Adjust the lower output.
13. Remove cover C from gas train.
With the adjusting screw below,
set the CO content for lower out-
2
put to 8.7 %.
14. Refit cover C.
content
2
23